Random row filter is not working in latest release

[nj1973]

In commit 783d1b0#diff-ce217c386e702709267508ebe1bc725106c6bcba326c1ccb29951d506855ae6aR1434 the following change was made:

-    use_random_rows = getattr(args, "use_random_row", False)
-    random_row_batch_size = getattr(args, "random_row_batch_size", None)
+    use_random_rows = getattr(args, consts.CONFIG_USE_RANDOM_ROWS, False)
+    random_row_batch_size = getattr(args, consts.CONFIG_RANDOM_ROW_BATCH_SIZE, None)

Notice that "use_random_row" is not the same as the value of constant consts.CONFIG_USE_RANDOM_ROWS. The value is "use_random_rows" (with a trailing "s").

We need to either:

1. Revert the change on that line to "use_random_row" or
2. Change the name of the option to --use-random-rows

I'm surprised we don't have tests to cover this, but perhaps first we just fix this at the highest priority and create a new issue to add a test.